v0.5.1

Aqua v0.5.1

Diff since v0.5.0

Closed issues:

• specify argument for test_stale_deps from test_all (#53)
• 0.5 is not released (#54)
• invalid version string for julia version (#55)

Merged pull requests:

• Release 0.4.11 (#48) (@tkf)
• Properly parse compat (#57) (@tkf)